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I should have added forks and pedals is where I saw weight. There are forks out there that are light. My old Marzocchi Martathon something or other are 1700g. They need an overhaul so are going cheap if the steerer legnth suits. I replaced them with a pair of rigid carbon forks and saved nearly 1kg.

Today I weighed a set of Geax Barro Race tyres -404g. These are going on my race bike tomorrow for the race on Sunday. I hope they don't pncture. You cold save some weight there.

The A2Z discs are very light as well. Ti and Alloy bolts where ever appropriate will save more weight. If a steel bolt is used somewhere a Ti bolt will do the same job and will save weight. You also cuberider have not stated the weights of any of the kit you have. To drop weight every component needs to be weighed, then you will know where weight can be saved,

Oh an XT M985 chainset is 630g - I bought one for my self recently. That will save a fair bit of weight (~350g) over your current chainset and BB.

As I said I have a old and heavy Orange Evo2 framed bike which by the the end of Friday will be about 9 kg using off the self parts and only bolt tuning. The rear wheel I built today for it is only 730g.